The present invention can be applied to the technical field pertaining to display devices and, for example, relates to a flat lighting device using a light emitting diode (LED) and a display device including same. The present invention provides a display device including a flat lighting device, wherein the display device may comprise: a light source which emits white light by using a light emitting diode and a yellow phosphor; a red phosphor layer which is disposed on the light source and adsorbs a part of the white light emitted from the light source to emit red light; and a first dichroic filter layer which is disposed on the red phosphor layer and has a reflective pattern reflecting at least a part of the long-wavelength side of the wavelength region of the red light.

The invention provides a light guide element comprising a light guide and a layer element, wherein the light guide comprises a light guide face and wherein the layer element comprises an optical layer, wherein said optical layer is in contact with at least part of the light guide face, wherein the optical layer has a first index of refraction (n1) smaller than the refractive index of seawater, wherein the light guide comprises a UV radiation transmissive light guide material.

A light box includes a first case, a second case, and a light emitting module. The first case includes an upper cover and a plurality of sidewalls, a first sidewall of the plurality of sidewalls has a horizontal light guiding slot. The second case includes a bottom plate. The upper cover, the bottom plate and the plurality of sidewalls form a storage space. The light emitting module is placed in parallel to the bottom plate in the storage space.

An optical system is provided. The optical system includes a first optical module with a first light-entering hole, a second optical module with a second light-entering hole, and a third optical module with a third light-entering hole. The second light-entering hole is close to the first light-entering hole and the third light-entering hole. The focal length of the second optical module is different from the focal length of the first optical module and the focal length of the third optical module.

A mouse device includes a casing, at least one aspheric light guide plate and a light source. The casing includes an upper cover and a base. The upper cover includes at least one lateral surface. The aspheric light guide plate is installed on the lateral surface of the upper cover. Each aspheric light guide plate includes a light input surface and a light output surface. The light input surface and the light output surface are not in parallel with each other. The light output surface is aligned with the corresponding lateral surface of the casing. The light source is installed on the light input surface of at least one aspheric light guide plate. The light source emits light beams. After the light beams are inputted into the aspheric light guide plate through the light input surface, the light beams are outputted from the light output surface.

The present application concerns an optical device for controlling light, the optical device including: a first waveguide for receiving a light beam from an external light source, at least a second waveguide, an optical coupler for coupling a light beam from the first waveguide to the second waveguide, a beam shaping structure with a light emitting area for emitting a light beam, wherein the second waveguide is configured to guide a light beam coupled from the first waveguide to the beam shaping structure, wherein the beam shaping structure is configured to propagate a light beam received from the second waveguide to the light emitting area such that the beam divergence of a light beam emitted from the light emitting area is lower than the beam divergence of the light beam received from the second waveguide.

A waveguide illuminator includes an input waveguide, a waveguide splitter coupled to the input waveguide, and a waveguide array coupled to the waveguide splitter. The waveguide array includes an array of out-couplers out-coupling portions of the split light beam to form an array of out-coupled beam portions for illuminating a display panel. Locations of the array of out-couplers are coordinated with locations of individual pixels of the display panel, causing each light beam portion to propagate through a corresponding pixel of the display panel, thereby improving efficiency of light utilization by the display panel.

The invention relates to a waveguide having a partially transparent incoupling portion, having a decoupling portion which is spaced apart from the incoupling portion in the lateral direction, having a substantially transparent base body which is outside of the incoupling portion and outside of the decoupling portion, wherein the transparent base body has a front side and a rear side, the wave guide having a diffractive incoupling structure in the incoupling portion and the waveguide having a decoupling structure in the decoupling portion, the diffractive incoupling structure being designed to diffract radiation coming from an object to be detected and incident on a front side of the waveguide in the incoupling portion only in part such that the diffracted part propagates to the decoupling portion by reflections in the base body as incoupled radiation, wherein the decoupling structure deflects at least one part of the incoupled radiation incident thereon such that the deflected part exits the base body in the decoupling portion via the front side or the rear side of the base body as decoupled radiation, and wherein the diffractive incoupling structure has at least one diffractive efficiency which continually decreases toward one edge of the incoupling portion.

Disinfecting devices (100) can include an electromagnetic wave emitting device (EWE device 110) configured to emit UV radiation (115) and a light guide (120) having a front surface (121). The light guide can be configured to distribute UV radiation received from the EWE device across the front surface and be partially transmissive of visible light. UV radiation received by the light guide and distributed across the front surface can function to disinfect the front surface. The device may be configured such that when positioned between a use device (140) and a user (150), the use device is observable through the disinfection device. Methods for disinfecting may similarly include emitting UV radiation into a light guide, reflecting and diffusing UV radiation within the light guide across the front surface of the light guide thereby disinfecting the front surface; and receiving an interaction with a use device through the disinfection device via the front surface from a user.

A light-emitting device includes: a base portion; a plurality of light-emitting elements disposed on an upper surface of the base portion, the plurality of light-emitting elements including: a first light-emitting element configured to emit first light from a first emitting surface, and a second light-emitting element configured to emit second light from a second emitting surface; and one or more reflective members disposed on the upper surface of the base portion and configured to reflect upward the first light and the second light. The one or more reflective members include: a first reflective surface configured to reflect the first light, a second reflective surface configured to reflect upward the first light that has been reflected at the first reflective surface, and a third reflective surface configured to reflect the second light.